GB 27887-2024 English PDF (GB27887-2024)

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GB 27887-2024: Child restraint systems for power-driven vehicles
GB 27887-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.60
CCS T 26
Replacing GB 27887-2011
Child restraint systems for power-driven vehicles
ISSUED ON: SEPTEMBER 29, 2024
IMPLEMENTED ON: JULY 01, 2025
Issued by: State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword ... 3
1 Scope ... 8
2 Normative references ... 8
3 Terms and definitions ... 9
4 General requirements ... 22
5 Performance requirements ... 37
6 Test methods ... 50
7 Test report ... 73
8 Marking ... 74
9 Instruction guidance documents ... 81
10 Determination of the same type ... 85
11 Implementation of standard ... 86
Appendix A (Normative) Requirements for additional anchorages for rearward-facing
child restraint systems fixed by seat belts on specific vehicles ... 87
Appendix B (Normative) Standard seat belt ... 88
Appendix C (Normative) Height measuring device and measurement method of booster
cushion ... 92
Appendix D (Normative) Lower torso test ... 95
Appendix E (Normative) Internal dimensions ... 97
Appendix F (Normative) i-Size support leg size assessment body and support leg and
foot assessment body ... 105
Appendix G (Normative) Energy absorption test method ... 110
Appendix H (Normative) Method for determining the head impact area ... 112
Appendix I (Normative) Description of sled ... 113
Appendix J (Normative) Determination of dynamic test performance index ... 123
Appendix K (Normative) Corrosion test ... 124
Appendix L (Normative) Load application device ... 126
Appendix M (Normative) Time function curve of sled braking deceleration or
acceleration... 130
Appendix N (Normative) Front impact test procedure ... 133
Appendix O (Normative) Rear impact test procedure ... 135
Appendix P (Normative) Dummy and calibration procedure ... 138
Appendix Q (Normative) Buckle strength test method ... 164
Appendix R (Normative) Micro-slip test ... 165
Appendix S (Normative) Layout of dust test equipment ... 166
Appendix T (Normative) Abrasion test ... 167
Appendix U (Normative) Adjustment device durability test method ... 169
References ... 171
Child restraint systems for power-driven vehicles
1 Scope
This document defines the terms and definitions of child restraint systems for power-
driven vehicles (hereinafter referred to as "child restraint systems", CRS); specifies
general requirements, performance requirements, test reports, marking and instructional
guidance documents; describes the corresponding test methods.
This document applies to the following types of child occupant restraint systems
suitable for installation in power-driven vehicles:
a) Integral universal ISOFIX child restraint system (i-Size child restraint system);
b) Integral ISOFIX child restraint system for specific vehicle models;
c) Integral universal belted child restraint system;
d) Integral seat belt fixed child restraint system for specific vehicle models;
e) Non-integral universal child restraint system with backrest (i-Size booster seat);
f) Non-integral child restraint system with back for specific vehicle (booster seat for
specific vehicle models);
g) Non-integral universal child restraint system without backrest (universal booster
cushion);
h) Non-integral child restraint system without backrest for specific vehicle models
(booster cushion for specific vehicle models).
2 Normative references
The contents of the following documents constitute the essential provisions of this
document through normative references in the text. Among them, for referenced
documents with dates, only the version corresponding to that date applies to this
document; for referenced documents without dates, the latest version (including all
amendments) applies to this document.
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method
GB/T 3505 Geometrical product specifications (GPS) - Surface texture: Profile
method - Terms, definitions and surface texture parameters
strap clip shall not affect the path of the seat belt.
4.1.3.6 Booster cushions shall not be used for children with a height of less than 125
cm. It shall be ensured that the top of the child's head is not lower than the horizontal
plane 770 mm above the Cr axis when the child is riding. The inspection method is in
accordance with Appendix C.
Note: Not applicable to built-in child restraint systems.
4.2 Structure
4.2.1 The structure of the child restraint system shall meet the following requirements.
a) The child restraint system shall provide the necessary protection in any specified
position. The insert of the seat surface shall be one layer; the use of additional
comfort cushions (such as mats) is permitted; however, the requirements of 4.3.1
and 5.1.5 shall be met when no comfort cushions are used. For "special needs
restraint systems", the primary restraint method shall provide the necessary
protection in the specified position of the child restraint system, even without the
help of any additional restraint device.
b) Children shall be easily restrained or removed. For child restraint systems that use
child harness belts or Y-shaped belts without retractors to restrain children, each
shoulder strap shall be able to maintain relative movement with the lap strap
during the process specified in 5.2.1.4. In this case, the seat belt installed in the
child restraint system may be designed as two or more connected parts. It is
generally believed that the additional restraint device of the "special needs
restraint system" will limit the speed at which the child is restrained or removed;
the additional device shall be designed to be released as quickly as possible.
c) If the child restraint system is adjustable in inclination, it shall not be necessary
to manually readjust other components of the child restraint system when
adjusting the inclination. The adjustment of the inclination of the child restraint
system needs to be completed through intentional manual operation.
d) In order to prevent the body from sliding down due to impact or the child's own
movement, all integral forward-facing child restraint systems shall be equipped
with a crotch strap, which together with the shoulder strap and the lap strap
constitute a complete child harness belt. For child restraint systems that use a
impact protection device instead of a child harness belt, the impact protection
device shall cover the entire width of the child's body and be placed at the pelvic
position.
e) For all child restraint systems with a lap strap, it shall be ensured that the lap strap
can transfer the load to the pelvic area of the child occupant. The restraint system
shall not exert excessive pressure on the weaker parts of the child's body
surface or occupant clothing;
- The rigid parts of the child restraint system shall not have sharp edges that cause
strap wear at any part of the contact with the strap.
4.2.3 Removable or movable parts designed for maintenance or adjustment shall only
be removed or moved with the help of special tools. Any possibility of incorrect
assembly or use of these parts shall be avoided. The assembly and disassembly process
shall be detailed in the user manual of the child restraint system. Child harness belts
shall be adjustable within their adjustment range without disassembly.
4.2.4 Special needs restraint systems may have additional restraint devices, which shall
be...